Hosting Operations
Read-only, can be slowList Failed Tests from JUnit XML
A test log is long, but the JUnit report contains structured failure records that can identify failed test cases quickly.
Command
grep -RIn '<failure\|<error' artifacts/test/*.xmlBefore you run this
System impact: Read-only. Can create load on large logs, directories, filesystems, or process tables.
When not to use it: Do not use simple grep as a full XML parser when exact structured extraction is required.
Expected output
JUnit XML lines containing failure or error elements.
System impact
Read-only, can be slow. Nothing changes. grep prints failure and error records from XML reports.
Scope this to the smallest useful path or service on busy systems.
Recovery / rollback: no state is changed.
When to use it
Use when test logs are noisy but XML reports are available.
When not to use it
Do not use simple grep as a full XML parser when exact structured extraction is required.
next steps
Related commands
Scan Every CI Log for Error Lines
One grep pass can turn a log pile into a failure list.
grep -RInE 'error|failed|failure|exception|traceback' artifacts logs | head -50
Summarize Test Counts from Reports
Before debugging a test failure, measure the blast radius.
grep -RhoE 'tests="[0-9]+"|failures="[0-9]+"|errors="[0-9]+"|skipped="[0-9]+"' artifacts/test/*.xml | sort | uniq -c
Find Tests That Passed After Rerun
A green retry can still hide a flaky test.
grep -RInE 'rerun|retry|flaky|passed on retry|failed attempt' artifacts logs
Tail the Failing CI Lines
Skip the full CI log and jump straight to lines that usually explain the failure.
grep -RInE 'error|failed|exception|traceback|fatal' logs/ | tail -50
Show Context Around the First Error
The line before the error often explains the error.
grep -RInC 3 -m 1 'ERROR' artifacts logs
Study mapping
Use this as independent command practice: read the notes, predict the output, then compare it with the example before using a real shell.
Independent study support only. No affiliation, endorsement, exam dumps, or real exam questions.